GB9027259D0 - Gradation control circuit for a thermal head - Google Patents

Gradation control circuit for a thermal head

Info

Publication number
GB9027259D0
GB9027259D0 GB909027259A GB9027259A GB9027259D0 GB 9027259 D0 GB9027259 D0 GB 9027259D0 GB 909027259 A GB909027259 A GB 909027259A GB 9027259 A GB9027259 A GB 9027259A GB 9027259 D0 GB9027259 D0 GB 9027259D0
Authority
GB
United Kingdom
Prior art keywords
control circuit
thermal head
gradation control
gradation
thermal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB909027259A
Other versions
GB2239543A (en
GB2239543B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Publication of GB9027259D0 publication Critical patent/GB9027259D0/en
Publication of GB2239543A publication Critical patent/GB2239543A/en
Application granted granted Critical
Publication of GB2239543B publication Critical patent/GB2239543B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
    • H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
    • H04N1/4056—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern the pattern varying in one dimension only, e.g. dash length, pulse width modulation [PWM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/40025—Circuits exciting or modulating particular heads for reproducing continuous tone value scales
    • H04N1/40031—Circuits exciting or modulating particular heads for reproducing continuous tone value scales for a plurality of reproducing elements simultaneously

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Electronic Switches (AREA)
  • Facsimile Heads (AREA)
GB9027259A 1989-12-25 1990-12-17 Gradation control circuit for a printing head Expired - Fee Related GB2239543B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1335742A JPH03193469A (en) 1989-12-25 1989-12-25 Gradation controller of thermal head

Publications (3)

Publication Number Publication Date
GB9027259D0 true GB9027259D0 (en) 1991-02-06
GB2239543A GB2239543A (en) 1991-07-03
GB2239543B GB2239543B (en) 1993-09-08

Family

ID=18291968

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9027259A Expired - Fee Related GB2239543B (en) 1989-12-25 1990-12-17 Gradation control circuit for a printing head

Country Status (4)

Country Link
US (1) US5142301A (en)
JP (1) JPH03193469A (en)
DE (1) DE4041384C2 (en)
GB (1) GB2239543B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2799263B2 (en) * 1992-05-20 1998-09-17 富士通株式会社 Image output device
US5457488A (en) * 1993-04-12 1995-10-10 Oki Electric Industry Co., Ltd. Method and apparatus for controlling array of light-emitting elements
US5519426A (en) * 1993-11-01 1996-05-21 Lasermaster Corporation Method for controlling a thermal printer to increase resolution
US5608442A (en) * 1994-08-31 1997-03-04 Lasermaster Corporation Heating control for thermal printers
DE19739732C2 (en) * 1997-09-11 2002-10-10 Mirow Georg Dieter Method and device for assessing the radiation of a sample
JP3709470B2 (en) * 2000-02-29 2005-10-26 株式会社沖データ Image recording device
CN102050133A (en) * 2010-12-13 2011-05-11 青岛四方车辆研究所有限公司 Anti-rolling beam hoisting rod for low speed maglev train

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5748868A (en) * 1980-09-05 1982-03-20 Mitsubishi Electric Corp Heat sensing recorder
JPS5779761A (en) * 1980-11-05 1982-05-19 Sony Corp Drive method for thermo-sensing picture display device
JPS5825965A (en) * 1981-08-08 1983-02-16 Sony Corp Correction circuit for characteristic of coloration in printer
JPS58150370A (en) * 1982-03-02 1983-09-07 Sony Corp Producing system of gradation signal for printer
US4532523A (en) * 1982-03-16 1985-07-30 Victor Company Of Japan, Ltd. Tone control for thermal ink-transfer printing apparatus
JPH0686127B2 (en) * 1986-06-23 1994-11-02 興 和 株 式 會 社 Fever type image recorder
JPS6374664A (en) * 1986-09-18 1988-04-05 Sony Corp Drive circuit of thermal head
JP2614637B2 (en) * 1988-04-20 1997-05-28 富士写真フイルム株式会社 Gradation image recording method in thermal printer device
US4963989A (en) * 1989-12-18 1990-10-16 Eastman Kodak Company Method and apparatus for grey level printing

Also Published As

Publication number Publication date
US5142301A (en) 1992-08-25
GB2239543A (en) 1991-07-03
JPH03193469A (en) 1991-08-23
DE4041384C2 (en) 1998-02-12
DE4041384A1 (en) 1991-06-27
GB2239543B (en) 1993-09-08

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19991217